Time course survival of <i>Busseola fusca</i> larvae.

<p>Larval survival on <i>Bt</i> and non-<i>Bt</i> (<i>NBt</i>) corn as a function of time, for the crosses S × S, R × R and R × S. Points correspond to the average observed survival. Shaded areas correspond to the respective minimum and maximum observed survival.</p